TMV3 Thermostatic Mixing Valves

Thermostatic Mixing Valves for Healthcare Buildings

The TMV3 approval scheme ensures thermostatic mixing valves comply with the NHS specification D08 and are therefore suitable for use within healthcare premises.

The TMV3 scheme was developed to ensure mixing valves were manufactured to handle the variations in UK water supply conditions such as low pressure from gravity fed systems or mixed pressure systems such as high pressure mains cold water and low pressure hot water supplies.

Additionally prior to when the NHS D08 specification was developed in 1997, UK regulations were significantly weaker and did not require TMV's to incorporate additional safety features needed within healthcare premises where users are at a higher risk of burns and scalds.

The TMV3 scheme is a third party scheme which is managed by BuildCert.

Buildcert & TMV3 Approvals

The TMV3 approval process is 5 year certification and is very strict and a large number of tests are carried out before approval can be given. Additionally manufacturers must comply with a number of other prerequisites before mixing valves can be considered for testing and approval.

Manufacturers must hold ISO 9001 accreditation or be audited by BuildCert and they must subscriber to the BuildCert scheme.

Manufacturers are required to submit 3 sample valves from a production batch of 30 for testing along with documents regarding the material specifications, drawings, installation and maintenance, marketing information and more.

All thermostatic mixing valves submitted must be WRAS approved or all non-metallic materials which are in contact with water must comply with WRAS requirements or comply with BS6920.